Adjustable guide-plate guard.



P. RIEBE. ADJUSTABLE GUIDE PLATE GUARD.

Patented N0v.4,1913.

APPLICATIN YILED MAR.24,1913. 1,077,432.

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ADJUSTABLE GUIDE-PLATE GUARD.

Specification of Letters Patent.

l.retreated Nov. e, taie.

Application filed March 24, 1913. Serial No. 756,344.

.the lsheets of paper abut to attain vproper register in the printing operation. And the .present improvement has for its object to provide a simple and effective structural formation and combination of parts 1n a feed guide, whereby a very accurate register is attained regardless of the thickness of paper used, or any wavy or other irregular nature of such paper, all as will hereinafter more fully appear.

In the accmipanying drawings Figure 1 isa side elevation with parts in section, illustrating the general arrangement of the present improvement as adapted to the front guide of a printing press. Fig. 2. is a rear elevation of the same. Fig. 3, is a horizontal section on line -r/J, Fig. 1. Fig. 4, is a similar view, on line :lf-w, Fig. 1.

Similar reference numerals indicate like parts in the several views.

Referring to the drawings, 1 represents the usual rock shaft of the press, upon which the front guides are mounted for transverse adjustment as required, and said shaft receives the usual intermittent rocking motion in unison with the other mechanisms of the press.

2 is the usual socket member of a front guide. .Said socket member is formed with vthe usual clamping collar 3, by which it is secured in a transverse adjustable manner on the aforesaid rock shaft 1, and with a rearwardly extending tubular arm .4, for the hereinafter described stem of the front guide plate.

5 is the feedboard of the press disposed y tp the rearzof the rock shaft 1, and carrying the usual transversely adjustable guide rests 6 .for the front guide plates above referred to.

.7 .is a front guide plate ofthe usual triangular form and lixedly secured tothe'rear .end of a carryingstem -;S, rzhh in tarn iis carried in a longitudinally adjustable manner by the tubular arm Lle, of the socket member 2, aforesaid. The lower end of the plate 7 is formed with a pair of depending marbar or finger of the guard rest 6, to hold the parts against independent lateral motion, and at the same time prevent a slippage of the paper sheet under the guide vplate 7. Intermediate of the prongs 9, the

lower end of the guide plate 7 is formed with a Ipair of separated recesses or notches 10, for the reception of the free ends of the elastic guide plate guard hereinafter described.

11 is the elastic feed plate guard, preferably lformed of resilient sheet metal, and comprising an orificed vertical attaching portion l2, by which it is secured to the rear end of thc carrying stem 8, aforesaid; an intermediate curved or loop shaped portion 13, and a free lower portion 1st, which is normally inclined to the linger of a guard rest 6, to provide a. rearwardly flaring guide throat between the parts, as shown in Fig. 1. Said lower portion 14, as well as the adjacent part of the loop portion 13, are

bifurcated to form a pair of counterpart elastic prongs as shown, with the free ends of .said prongs engaging in the separated notches 10 in the lower end of the guide plate 7 In the present improvement the said prongs are provided with lateral extensions 15 adapted to provide increased bearing surfaces adjacent to the guide plate, and with a view to more effectively remove any curvature, etc., in the margin of the sheet of paper being fed against the guide plate, and in consequence attain more perfeet register.

1G is an upright adjusting shaft disposed within the loop shape elastic guard 11 aforesaid, and formed with upper and lower screw-,threaded portions, which are preferably right and left handed respectively, as shown, and separated by a central enlargement 17, adapted to afford means for the manual rotation of the shaft as required. Tliezupper portion of the shaft 16 has abutment against the approximately rigid curved portionvl of the guard 11, and in the particular construction shown in the drawings .passes through a longitudinally elongated ,slot 18, in the guard 11 aforesaid, and'is vginal prongs 9, adapted to stra-ddle the front 14 of the guard aforesaid, by a series. of at taching feet Q0, as shown,

21 is a nut engaging the upper screw,- threaded portion of the shaftv 16, and disposed beneath the upper part of the intermediate loop portion 13 of the guard aforee,

said. Said nut is provided with a side pro jection 22, which engages in the elongated slot 1S to prevent independent rotation of said nut.

23 is a bearing washer surrounding the upper portion of the shaftlG, and having bearing upon the upper surface of the guard 11 aforesaid, as shown in Fig. 1. It is preferable to make the bearing surfaces of the nut 21 and washer 23 of the curved form shown, with a. View to attain uniform bearings in the varied adjustments of the parts.

24 is a claniping'nut engaging the upper end of the shaft 16, and having bearing upon the washer 23, and adapted to clamp the parts in position, after an adjustment has been effected.

vI/Vhile I have shown and described my invention as applied to th e lfront. guide of a press, it is Within the scope of my invention to apply the saine to the companion side guides carried at one side of the feed board. l

In the practical operation of the present structure,h a turning of the sereni-threaded shaft 16, in one direction or the other, is adapted to either' increase or diminish the size of the rearwardly {ia-ring throat between the free lower portion 14 of the guard, and the finger of the guide rest 6, to suit different thicknesses of paper used on the press.

By a longitudinal shifting of the upper end of the shaft- 16, in one direction or the other in the elongated slot 1S of the guard aforesaid, and either alone, or in conjunction with a rotation of said shaft 16, the rearward flare of the aforesaid throat can ybe increased or diminished to meet the varied practical requirements in an attainment accurate register of the sheets or paper, and

due to varied thicknesses, wavy of the paper used.

In the present improvement the elastic feed plateguard and its adjusting means constitute a self-contained portion or unit of the press structure, and are capable of ready attachment and detachment as a whole, iu that its sole means of attachment is the holding nut which secures the guide plaie T iu place upon the stein S of the press strucliu'c. Such construction is accordingly economical in manufacture and confenieut in actual use.

nature, etc.,

within `said loop shape guard and attached at its respectiveends to said guard to provid ya self-contained structure.

2. In a feed guide for printing presses, the combination of a guide plate, an open loopv shape guard associated With said plate, and means disposed Within said loo shape guard for varying the size thereof, t ie saine comprising an upright screw-threaded shaft, and nuts associated With said shaft and with the upper and lower portions of said loop.

shaped. guard.

3. In a feed guide for printing presses, the combination of a guide plate, an open loop shape guard associated with said plate, and means disposed within said loop shape guard for varying the size thereof, the same comprising an upright screw-threaded shaft, and nuts associated with said shaft and with the upper and lower portions of said loop shaped guard, said guard having an elongated slot at the top for the passage and longitudinal adjustment of the upper end of the aforesaid shaft.

4. In a feed guide for printing presses, the combination of a guide plate, an open loop shape guard associated with said plate, and means disposed within said loop shape guard for varying the size thereof, the same comprising an upright right and left hand screw-threaded shaft, a nut secured to the lower free portion of said guard and having engagement with the lower portion of said shaft, a nut bearing beneath the upper portion of said guard and having cngagenient with the'upper portion of said shaft, and a clamping nut engaging said shaft outside the guard aforesaid.

5. In a feed guide for printing presses, the combination of a guide plate, an open loop shape guard associated with said plaie, and means disposed. within said loop shape guard for varying the size thereof, the

saine comprising an upright right and left hand screw-threaded shaft. a nut. secured to the lower free portion of said guard and having engagement with the lower portier., of said shaft, a nut bearing beneath the upper portion of said guard ,and having' engagement with the upper portion of shaft, and a clan'iping` nut engaging s in shaft outside the guard aforesaid, said gua:

. i' having an. elongated slot at the top for passage and longitudinal adjustment of the aforesaid shaft.

6., ln a feed guide for. printing presses, tion to the lower edge of the guide plate, theeombination of a guide plate, an open and means associated with said guard for loop shape guard having a fixed portion seadjusting' the free portion thereof. cured against the `upper portion of the Signed 'at Chicago, Illinois, this 20th day 5 guide plzte and 1an 1adjustabe ree' Cportion of March, 1913.

associate with t e ower en o sai oruide plate, said adjustable free portion having a PAUL RIEBE bifurcated form to provide a pair of elastic Witnesses: prongsl with each prong formed with an ROBERT BURNS,

10 outward lateral extension in `coacting rela- HENRY MOE. 

